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3. (b) Given Sara's age today to be y years. Think of her age in the future or in the past. What will the following expression indicate?

Q. 3.    (b) Given Sara’s age today to be y years. Think of her age in the future or in the past. What will the following expression indicate?

   y+7, y-3, y+4\frac{1}{2},  y-2\frac{1}{2}.

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Her age in past = (y-3),(y-2\frac{1}{2})

Her age in future  =(y+7),(y+4\frac{1}{2})

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